I had to make a switch replacement (6224) by a 6450. Only now, the OmniVista software installed on the site no longer sees the switch in question.
I kept the same IP address for the switch. I think I have the right configuration snmp (??) but the switch icon remains red ...
Not knowing the software, is there a special manipulation so that it passes again the icon of the switch in green?

By chance, would you have an example of snmp v2 configuration for the switch (AOS version 6.7.1 R02)?

Test your snmp on the swith with a tool e.g. Paessler SNMP Tester https://www.paessler.com/tools/snmptester
If that work see that you have the correct snmp profile in OV, probably best to delete the old device and rediscover it with omnivista